Non-Markovian theory of electron paramagnetic resonance in localized and quasi-localized electron spins via an example of manganites with colossal magnetoresistance

Khalvashi EK

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Non-Markovian theory of electron paramagnetic resonance in localized and quasi-localized electron spins via an example of manganites with colossal magnetoresistance

机译：局部和准局部电子自旋中的非马氏电子顺磁共振理论

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An approach based on the memory functions formalism is applied to derive non-Markovian equations of motion for the magnetization components of localized and quasi-localized electron spins under electron paramagnetic resonance (EPR) conditions using the example of manganites with colossal magnetoresistance. General Hasegawa-Bloch-type equations are applied to describe certain experimental data concerning the shape and the width of EPR lines and the longitudinal and transverse relaxation rates. Particular cases of these equations reproduce well-known theoretical results concerning EPR in manganites with colossal magnetoresistance. The results obtained explain certain well-known experimental phenomena and may stimulate further research. (C) 2005 Pleiades Publishing, Inc.

机译：以具有巨大磁阻的锰矿为例，采用了一种基于记忆函数形式主义的方法来导出非马氏运动方程，用于在电子顺磁共振（EPR）条件下局域和准局域电子自旋的磁化分量。应用一般的长谷川-布洛赫（Hasegawa-Bloch）型方程来描述有关EPR线的形状和宽度以及纵向和横向弛豫率的某些实验数据。这些方程式的特殊情况再现了有关具有巨大磁阻的锰矿中EPR的众所周知的理论结果。获得的结果解释了某些众所周知的实验现象，可能会激发进一步的研究。（C）2005年Pleiades Publishing，Inc.

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《Journal of Experimental and Theoretical Physics》 |2005年第2期|共12页
作者
Khalvashi EK;
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正文语种 eng
中图分类理论物理学;
关键词
EPR; ESR; LA1-XCA(X)MNO3; RELAXATION; SATURATION; DYNAMICS; PHASE; SHAPE; LINE;

机译：EPR;ESR;LA1-XCA（X）MNO3;松弛;饱和;动力学;相;形状;线;

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1. Non-Markovian theory of electron paramagnetic resonance in localized and quasi-localized electron spins via an example of manganites with colossal magnetoresistance [J] . Khalvashi EK Journal of Experimental and Theoretical Physics . 2005,第2期

机译：局部和准局部电子自旋中的非马氏电子顺磁共振理论
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3. Theory of non-Markovian relaxation of single triplet electron spins using time-and frequency-domain magnetic resonance spectroscopy measured via optical fluorescence: Application to single pentacene molecules in crystalline p-terphenyl [J] . Kilin SY., Berman PR., von Borczyskowski C., Physical Review, B. Condensed Matter . 1998,第14期

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4. Colossal magnetoresistance in manganites: role of the electronic phase segregation [C] . M. R. Ibarra, J. M. De Teresa Latin American Workshop on Magnetism, Magnetic Materials and their Applications . 1999

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Non-Markovian theory of electron paramagnetic resonance in localized and quasi-localized electron spins via an example of manganites with colossal magnetoresistance

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